APC is a free, open, and robust framework for caching and optimizing PHP intermediate code.

Release notes
Version 3.1.6
(stable)

- make slam&lowbar;defense a little more optimistic&comma; allow a thread&sol;process to write to cache in a loop- ensure realpaths hit the realpath&lowbar;cache&comma; in no-stat mode- prevent memory starvation&comma; nuke all caches when expunging just one doesn't work- fix uploadprogress keylength issues &lpar;NUL is part of keylen&comma; pecl bug &num;20016&rpar;